Merit Brass C187-08 Brass Pipe Union 1/2 in Fnpt Class 125

Product Description

The MERIT BRASS C187-08 is a 1/2 inch brass pipe union designed for threaded pipe assemblies in plumbing, HVAC, and light industrial piping systems. It connects two sections of pipe with female NPT (FNPT) ends on both sides, allowing a technician to disconnect and reconnect a piping run without cutting or unthreading the entire line. Rated Class 125, this union is built for low-to-medium pressure service in water, gas, and compatible fluid applications. The all-brass construction resists corrosion and stands up to the repeated wrenching typical in service and repair work. Licensed plumbers and pipefitters are the primary installers for this fitting type.

This union is suited for residential and light commercial plumbing and hydronic heating systems where a 1/2 inch threaded connection point is required. It is commonly installed on water supply lines, gas branch lines, boiler piping, and equipment isolation points where future serviceability is a priority. The FNPT x FNPT configuration threads directly onto male-threaded pipe or fittings on both sides of the union body.

Key Features

• 1/2 inch fitting size with FNPT x FNPT end connections for standard threaded pipe assemblies
• Class 125 pressure rating suitable for low-to-medium pressure water and compatible fluid service
• Brass construction provides corrosion resistance and durability in wet and humid environments
• Three-piece union design allows piping disconnection without disturbing the full run
• Threaded connection type requires no soldering or crimping tools

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/2 inch threaded pipe systems using standard NPT threading in Class 125 service applications.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing codes. Shut off and depressurize the affected piping system completely before removing or installing any union. Apply an appropriate thread sealant or PTFE tape to all male NPT threads before assembly. Do not overtighten; use a properly sized pipe wrench and follow standard trade practice for brass fittings to avoid cracking the union nut.